EP3716711A1 - Konfiguration eines dedizierten uplink-ressourcenübertragungsplans - Google Patents

Konfiguration eines dedizierten uplink-ressourcenübertragungsplans Download PDF

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Publication number
EP3716711A1
EP3716711A1 EP19165108.2A EP19165108A EP3716711A1 EP 3716711 A1 EP3716711 A1 EP 3716711A1 EP 19165108 A EP19165108 A EP 19165108A EP 3716711 A1 EP3716711 A1 EP 3716711A1
Authority
EP
European Patent Office
Prior art keywords
base station
user equipment
uplink
prescheduled
dedicated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19165108.2A
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English (en)
French (fr)
Inventor
Volker Breuer
Osaid KHALIQ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales DIS AIS Deutschland GmbH
Original Assignee
Thales DIS AIS Deutschland GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thales DIS AIS Deutschland GmbH filed Critical Thales DIS AIS Deutschland GmbH
Priority to EP19165108.2A priority Critical patent/EP3716711A1/de
Priority to US17/441,739 priority patent/US11770824B2/en
Priority to JP2021548631A priority patent/JP7196328B2/ja
Priority to CN202080023965.6A priority patent/CN113892294A/zh
Priority to KR1020217030672A priority patent/KR20210127998A/ko
Priority to PCT/EP2020/058178 priority patent/WO2020193557A1/en
Priority to EP20712585.7A priority patent/EP3949593B1/de
Publication of EP3716711A1 publication Critical patent/EP3716711A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies

Definitions

  • the present invention relates to a method for operating a base station capable of supporting dedicated uplink resource transmission schedule for a user equipment operating in a cellular network.
  • the invention also pertains to a base station of a cellular network using said method.
  • the invention also pertains to a method for a user equipment operating with said base station.
  • the invention further relates to a user equipment operating using said method.
  • the cellular network tends to support a wide variety of user equipments.
  • machine-type devices also covered by the term Internet of things, a couple of modifications are in preparation that are used to streamline the operation between cellular network and user equipment for special needs of the machine-type device.
  • MTC devices are configured to carry out regular transmission like daily measurements, status updates, requests for updates etc.
  • wireless technology standards adaptations are developed e.g. as discussed in EP3032903A1 , how to better prepare the cellular networks for such kinds of periodic data transmissions.
  • D-PUR dedicated preconfigured uplink resources.
  • this concept is called hereinafter dedicated prescheduled uplink transmission schedules.
  • the machine-type user equipment negotiates with the base station resp. the cellular network a regular periodic scheduling, e.g. once a day / once per hour at a specific time. That means, the user equipment does not need to ask for resource on that specific occasion, but is expected to carry out at least one uplink transmission, while the base station is prepared for this transmission and has reserved resources for that user equipment, but without or at least minimized additional signalling in preparation of each data transmission.
  • the situation may also arise if the application attached to the user equipment started an additional uplink (UL) communication which may be allocated on a different frequency, and hence cannot fulfill or does momentary not need the pre-scheduled transmission occasion.
  • UL uplink
  • DL downlink
  • the first aspect of the invention it is proposed a method for operating a base station of a cellular network for serving at least one user equipment camping on said base station, said base station having agreed with the user equipment on a periodic dedicated prescheduled uplink transmission schedule, in case one or more uplink occasion of the dedicated prescheduled uplink transmission schedule is missed by the user equipment, the method comprising for the base station the step of determining if the user equipment is considered as unavailable for communicating at said uplink occasion in relation with the base station,
  • This aspect of the invention relates to a base station of a cellular network, in particular implementing one of the cellular technology standards 3G, 4G, 5G or beyond.
  • the base station is one of the plurality of base stations of the cellular network.
  • the base station is configured to serve at least one user equipment, which is regularly transmitting in particular a similar amount of data to a remote server and is in particular moreover operated stationary, where "stationary" means at least not or merely not moving for a certain time period in which several regular transmissions should be carried out.
  • An example for such a user equipment is a metering device which periodically transmits its measurements at a defined time, or at least in a defined corridor of time. This periodicity is preferably in the range from seconds up to days, depending upon the purpose of the user equipment.
  • a periodic dedicated prescheduled uplink transmission schedule is arranged between base station and user equipment.
  • the dedicated prescheduled uplink transmission schedule is a mode of operating between the user equipment and the base station which allows transmitting data in a predefined periodicity and data amount. No or at least limited additional signalling is necessary per each uplink occasion, that is the period where according to the dedicated prescheduled uplink transmission schedule the base station allocates resources sufficient for the expected data transmissions from the user equipment.
  • the user equipment For setting up the dedicates prescheduled uplink transmission schedule the user equipment preferably transmits a request to the base station indicative of the envisaged data transmission, in particular comprising amount of data and the planned periodicity. Moreover this request may also contain the duration for which the dedicated prescheduled uplink transmission schedule is envisaged, which my last from hours to infinity, the latter one especially beneficial for meter applications.
  • the base station in response evaluates the request according to the requested periodicity, duration and/or on the requested data amount, respective resources for uplink transmission according to a schedule with the approved periodicity. This information is provided in response to the user equipment with a confirmation message.
  • the user equipment can then preferably decide to accept the schedule or reject it and continue to operate without the dedicated prescheduled uplink transmission schedule. Preferably it may ask later, at least for a limited amount of times during a given period, for setting up the dedicate prescheduled uplink transmission schedule again, which then better fits to the requirements of the user equipment.
  • the base station indicates, in particular by means of SIBs, that it supports the dedicated prescheduled uplink transmission schedule.
  • the base station When this dedicated prescheduled uplink transmission schedule is set up, the base station expects the user equipment to carry out a data transmission on each uplink occasion that means the time when according to a schedule resources for a data transmission from the user equipment are allocated. Such data transmission does not require additional signalling for setting up the connection, or at least far less, than when the base station is not expecting it according to a schedule.
  • the base station by now terminated the transmission schedule. It is preferably a question of configuration how many of such missed uplink occasion lead to a termination, in any case this is from the base station's perspective preferably a quite low number in order not to allocate resources for a user equipment that is not operating anymore, while for a user equipment this amount is preferably a quite high number in order to avoid setting up the dedicated prescheduled uplink transmission schedule again, which needs a lot of power. In particular for battery driven user equipments this might be an issue and is preferably avoided. Obviously here no good number is possible, as the requirements of both user equipment and base station contradict.
  • the base station in case one or more uplink occasion is missed by the user equipment, that means the base station does not receive an uplink transmission from the respective user equipment, that instead of cancelling immediately the presently active dedicated prescheduled uplink transmission schedule, the base station is supposed to consider why the user equipment missed the uplink occasion(s).
  • this process is not necessarily started at the first missed occasion, which could be ignored by default, but when two or more missed occasions occur. Then the base station is supposed to check if cancelling the dedicated prescheduled uplink transmission schedule is appropriate.
  • the user equipment is capable of determining that the user equipment is to be considered as unavailable for communication in relation with the base station, at least at the uplink occasion, then the presently active dedicated prescheduled uplink transmission schedule is supposed to be maintained.
  • This step of considering comprises a check about the situation of the user equipment.
  • low-bandwidth devices e.g. operating in half duplex, or with limited processing power, are unavailable for communication at said uplink occasion with the base station, in particular for making the data transmissions expected in course of the dedicated prescheduled uplink transmission schedule. That means, although the user equipment might be operating in a communication session with the respective base station, it is to be considered as unavailable for communication at said uplink occasion with the base station, if such communication session is the reason for not making the data transmission at the uplink occasion.
  • This check takes into account that the base station might know about the reason for the missed uplink occasion. If this reason indicates, that the user equipment is in particular occupied resp. busy with other means, in particular initiated by the base station, then the missed uplink occasion is not considered for cancelling the presently active dedicated prescheduled uplink transmission schedule.
  • the reasons for considering the user equipment as being unavailable for communication with the base station might vary.
  • determining if the user equipment is considered as unavailable for communicating at said uplink occasion with the base station determining at least one of the situations, that:
  • This embodiment collects a couple of situations which for the base station are preferably considered to rate the user equipment as currently unavailable, at least at the uplink occasion.
  • the user equipment In case the user equipment is in course of a data exchange session, then it is - in particular when being a limited-bandwidth user equipment - unable to carry out an uplink data transmission.
  • Such user equipments are often only capable of half-duplex communication i.e. can either receive or transmit at a given time but not both simultaneously, in or operate in a limited frequency range only. Additionally or alternatively they may be limited in the sense of being capable only to support a limited number of processes i.e. one or two HARQ processes only because they only have the corresponding number of HARQ chains, means respective storage for processing said receptions/ transmissions.
  • the user equipment is additionally rated as being in course of a data exchange session, when the user equipment has transmitted data, and is waiting for a confirmation from the base station for the previous transmission. That means, that no real activity might be sufficient to rate the user equipment as unavailable, resp. occupied at the time of the uplink occasion.
  • a running software download to low-end devices camping on the base station is rated as data exchange session. This might be part of MBMS or SCPTM (Single Cell Point To Multipoint) transmission.
  • SCPTM Single Cell Point To Multipoint
  • the base station Due to the fact that in such cases the base station is involved in the data transmission it is aware of it and can consequently consider the affected user equipment as unavailable for communication, at least for uplink transmissions at the uplink occasion according to the dedicated prescheduled uplink transmission schedule.
  • a user equipment might be rated as unavailable for communication with the (first and serving) base station, when it notices that the user equipment is operating in connection with another (second) base station of the cellular network.
  • the first base station When the first base station is aware of this situation, then it is supposed not to expect an uplink transmission at the uplink occasion according to the presently active dedicated prescheduled uplink transmission schedule.
  • the base station may consider the user equipment as unavailable of communicating with the base station in case the user equipment was instructed to refrain from uplink communication, in particular as part of a radio policy.
  • Radio policy management (RPM) mechanisms are typically used to prevent the cellular network from and solve overload situations, i.e. limiting the access for such user equipments.
  • the user equipments are preferably instructed to refrain from accessing the cellular network, that means carrying out data transmissions, at least under given preconditions.
  • this embodiment suggests that the user equipment is not to blame for this situation.
  • the base station considers also in that situation the user equipment as unavailable for communicating with the base station, at least at the uplink occasion.
  • the base station is aware of this situation, and consequently it is able to determine that the user equipment is not capable of carrying out the uplink transmission as part of the uplink occasion.
  • This embodiment is a last resort for such situations that the base station for a long time detects a user equipment being considered as unavailable for communication in relation with the base station during said uplink occasion.
  • the predetermined number is rather high, in any case higher than the number of missed uplink occasions that are needed for cancelling the presently active dedicated prescheduled uplink transmission schedule, when the base station cannot consider the user equipment as unavailable for communicating with the base station.
  • the base station prelocate the resources originally reserved for the respective user equipment according to the presently active dedicated prescheduled uplink transmission schedule for other user equipments, in case the base station is aware of the situation that the respective user equipment will not be able to use the resources which would be reserved at a specific uplink occasion.
  • the base station when the base station e.g. initiated a downlink transmission to the user equipment, and is aware of the capability of the user equipment not to be able to make an uplink transmission during said downlink transmission session, then the base station can anticipate that the user equipment will not be able to use the imminent next occasions for an uplink transmission by the user equipment.
  • the base station can use the resources that will not be used for uplink transmission for another user equipment which is requesting for uplink resources at that time.
  • the base station is configured to provide an instruction to refrain from uplink communication as part of a radio policy to the user equipment, wherein the instruction comprises a limitation of communication attempts with the base station within a predetermined time to a certain number of attempts, comprising omitting data transmissions of the user equipment at the uplink occasion according to the dedicated prescheduled uplink transmission schedule for counting against said certain number of attempts.
  • This embodiment relates to another variant of RPM instructions.
  • the instructions following a radio policy sent by the base station to the user equipment comprises an indication, that it is only allowed to carry out a defined number of accesses during the validity of the RPM instructions, resp. during a predetermined time.
  • the base station is aware of the active dedicated prescheduled uplink transmission schedule of the user equipment, it softens the RPM instructions in that sense, that data transmissions at the uplink occasions according to the dedicated prescheduled uplink transmission schedule are not counted against the predetermined number.
  • This embodiment fulfills the requirement of both the user equipment's and the base station's resp. cellular network needs.
  • said instruction to refrain from uplink communication as part of a radio policy is provided in response to the reception of a data transmission from the user equipment in conjunction with the uplink occasion of the dedicated prescheduled uplink transmission schedule.
  • This embodiment comprises that the instructions according to radio policy, in particular RPM instructions, are different to the known approach not (only) transmitted as part of a rejection message, but as part of a confirmation message confirming receipt of the data transmission as part of an uplink occasion.
  • a base station of a cellular network configured to serve at least one user equipment camping on said base station, said base station being configured to agree with the user equipment on a periodic dedicated prescheduled uplink transmission schedule, wherein the base station is configured, in case one or more uplink occasion of the dedicated prescheduled uplink transmission schedule is missed by the user equipment,
  • the base station of this aspect of the invention is communicatively connected to other components of the cellular network. That is preferably happening through a wired connection link.
  • the base station further comprises transmitting and receiving circuitry and an antenna for communication with a plurality of user equipments in the cell area populated by the base station.
  • the base station further comprises processing circuitry for executing operating software, and in particular software implementing the method according to the first aspect of the invention.
  • the base station preferably comprises volatile and permanent memory for storing software, configuration data and caching data.
  • data relating to camping user equipments are stored at least volatile.
  • the second aspect shares the advantages of the first aspect of the invention.
  • This aspect of the invention relates to the operation of the user equipment in the situation described for the previous aspects of the invention.
  • the user equipment is camping on a base station, the so called serving base station. That is possible when it is situated, in particular stationary, in the cell area of the base station, or in other words it is sufficiently close to the base station for being able to receive signals of the base station and to transmit signals to the base station that are well received at the base station.
  • a stationary user equipment is one that is expected, at least for a remarkable period of time, not or not materially move from its place. This is the case in particular for fixed installed devices, like metering devices. But this can also apply to user equipment installed in a parking car.
  • the special situation for stationary user equipments is, that in the normal procedure it would not leave the cell area of the currently serving base station.
  • the user equipment is further capable of agreeing with the base station on a periodic dedicate prescheduled uplink transmission schedule. This is in particular the case for a stationary metering device or other devices that are frequently, periodically transmit data in a similar amount.
  • the base station is previously providing an indication to the user equipment that it supports the dedicated prescheduled uplink transmission schedules. This is preferably done via a broadcast, e.g. of system information, or as part of the registration resp. during a dedicated connection.
  • the user equipment sends a request for setting up such a dedicated prescheduled uplink transmission schedule to the serving base station.
  • That request in particular comprises the requested periodicity and the amount of data to be transmitted on each occasion for transmitting data, hereinafter uplink occasion. It is advantageous when this request is part of data transmission session, in particular one that is common to the following data transmissions according to the dedicated prescheduled uplink transmission schedule.
  • the base station When the base station confirms in response to the request setting up the dedicated prescheduled uplink transmission schedule, then the schedule is operative. Consequently the user equipment will according to the periodicity agreed upon send uplink data transmissions on each uplink occasion in the size as agreed.
  • the user equipment When no data transmission is possible for a few occasions the user equipment would prefer that it does not have to set up the dedicated prescheduled uplink transmission schedule again, in particular for a congested base station which might even refuse due to the high traffic a new uplink transmission schedule. Consequently when the user equipment is not capable of communicating with the base station at this uplink occasions, and in particular knows that this situation is known to the serving base station, then it will refrain from carrying out such uplink transmission. The consequence of ending the dedicated prescheduled uplink transmission schedule would under this condition not happen.
  • the user equipment will use the next uplink occasion to carry out data transmission, at least as long as it is not still or again unavailable at the time of the next uplink occasion.
  • the method further comprises the step of:
  • This embodiment relates to instructions from the base station to refrain from uplink communication.
  • This relates to base station that support means to prevent from overload situations, i.e. blocking or rejecting momentary traffic requests and indicating a time when the next attempt is expected.
  • overload situations i.e. blocking or rejecting momentary traffic requests and indicating a time when the next attempt is expected.
  • Such methods are known under the terms RPM or network friendly behavior. I.e. a user equipment is not allowed to do more connection attempts in a certain time or they are in generally blocked for a certain time.
  • To mitigate the relation of these overload mechanisms and related pre-scheduled transmission is also a goal of present invention.
  • the user equipment when operating in a dedicated prescheduled uplink transmission schedule may ignore the instructions as part of the RPM, and consequently continue sending data transmission at the time of the uplink occasion.
  • the base station indicates with its RPM instructions that this consideration of pre-allocated resources according to the dedicated prescheduled uplink transmission schedule for user equipment camping on the base station has been carried out. Consequently a user equipment which is operating in an active dedicated prescheduled uplink transmission schedule will carry out its data transmissions at the uplink occasions despite receiving the RPM instruction. However, at other times resp. for other purposes outside of the uplink occasion no data transmission may be carried out for the same user equipments.
  • this embodiment provides situational exceptions from the general RPM instructions, but not individual exceptions. That means, no originally affected user equipment is fully free to make data transmissions in contrast to the RPM instructions, only because a dedicated prescheduled uplink transmission schedule is active.
  • This RPM related behavior is called soft RPM hereinafter. It differs from other RPM schemes, where a coordination of the RPM related effects with the aims of a dedicated prescheduled uplink transmission schedule is carried out under different premises.
  • the step of carrying out uplink transmission comprises transmission of information of different origin and/or content than the previously submitted data transmission as part of the uplink occasion according to said dedicated prescheduled uplink transmission schedule.
  • the user equipment is put into the position to react on the communication limitation as part of the radio policy instruction.
  • the user equipment may use the uplink occasion for transmitting other data.
  • Those data are typically of other origin, e.g. no measurement data but in particular status data.
  • Such status data may in particular comprise the information to the remote server that a radio policy instruction is active. This might lead to avoid software update or other request from the remote server side.
  • a status update might relate to the situation of the user equipment resp. the attached application.
  • An example would be to detect in a connected car a situation, like mileage, oil level etc., that would trigger requesting to schedule a visit to the garage.
  • the method comprising the steps of omitting the occurring uplink occasions in that time for counting against that certain number.
  • This embodiment relates to another variant, wherein the RPM instructions comprises an indication for the addressed user equipment, that it is only allowed to carry out a defined number of accesses during the validity of the RPM instructions, resp. during a predetermined time.
  • This embodiment relates to a "hard RPM", as opposed to the soft RPM mentioned before. That means that even user equipments that are currently operating in a dedicated prescheduled uplink transmission schedule would be blocked from transmitting data.
  • a base station would consequently not cancel the dedicated prescheduled uplink transmission schedule due to the missing of an uplink occasion through the user equipment as this is following the RPM instruction.
  • the user equipment in case the user equipment has a need of carrying out its data transmission, in particular after a couple of uplink occasions have passed, then it is proposed according to this embodiment that the user equipment tries to register on another base station and carrying out its data transmission there. Should no such base station be available or such base stations are blocked, this will certainly fail, but at least the user equipment shall be able to try. After this attempt the user equipment returns to the first user equipment, where the dedicated prescheduled uplink transmission schedule is still active.
  • the dedicated prescheduled uplink transmission schedule is still active.
  • the dedicated prescheduled uplink transmission schedule is still active.
  • the dedicated prescheduled uplink transmission schedule continues without any additional signalling needs. It is supposed to continue as if nothing has happened.
  • This embodiment is advantageous as it allows the user equipment to carry out data transmissions when it is temporary blocked from the serving base station, however that does not mean that the dedicated prescheduled uplink transmission schedule needs to be cancelled. In particular in dense traffic agreeing upon a new dedicated prescheduled uplink transmission schedule could possibly not be successful.
  • a user equipment configured to be operated on a base station of a cellular network, wherein the user equipment is configured to agree with the base station on a periodic dedicated prescheduled uplink transmission schedule, and to carry out at least one uplink transmission (23) at at least one uplink occasion according to said dedicated prescheduled uplink transmission schedule, and to refrain from carrying out said uplink transmission in case the user equipment is unavailable for communicating in the uplink occasion with the base station.
  • This embodiment relates to a user equipment capable of operating with a base station according to the second aspect of a cellular network.
  • the user equipment provides a couple of components for conducting wireless communication.
  • This comprises at least processing circuitry for executing operation software, in particular those implementing the method of the first aspect of the invention.
  • the user equipment is capable of operating with a base station supporting the standards of 3G, 4G, 5G or beyond, including variants, like Nb-loT, CAT-M, Cat-1 etc., which also includes user equipments that are momentary operating in NB-loT or Cat-M mode for power saving reasons in low activity phases, although being possible to operate in higher categories.
  • the user equipment comprises transmitting and receiving circuitry in connection with at least one antenna, typically a transceiver for exchanging wireless communication signals with the base station of the cellular network.
  • a memory unit for volatiles and/or permanent storage of executable software, configuration data and measured data e.g. before transmitting as part of a neighbor measurement report.
  • the user equipment is configured to camp on a serving base station and to carry out data transmissions by means of the transmitting and receiving circuitry.
  • the user equipment provides an application part having processing circuitry for collecting measurement data, either measured by a sensor of the application or a remote sensor communicatively coupled to the application.
  • Such communicatively coupling might employ the transmitting and receiving circuitry of the user equipment, alternatively other communication circuitry, including wired connections, are used.
  • a Bluetooth, Wimax, or Wifi connection might be used.
  • the fourth aspect of the invention shares the advantages of the first aspect of the invention.
  • this invention advantageously solves the depicted problem and offers a solution which increases the benefit of agreeing on a dedicated prescheduled uplink transmission schedule between a base station and a user equipment. This leads to better congestion situation for the base station and to a advantageous power management of the user equipment.
  • FIG. 1 schematically shows a user equipment 10 of the type according to an embodiment of the invention, where the user equipment 10 is in a spatial relationship with a respective base station 4, according to an embodiment of another aspect of the invention.
  • the user equipment 10 is in particular stationary and a machine-type communication device. That is it is preferably configured to regularly transmit a certain amount of data to a remote server, in particular as electricity metering device, a vending machine or other device for monitoring of a defined situation with sensors.
  • the base station 4 is one of a plurality of base stations being part of cellular network 1. This base station 4 is the direct counterparts to the user equipments 10 on the air interface 2. Such a base station is in particular for cellular networks supporting the LTE technology standard an eNodeB. Compared to previous technology standards eNodeBs cover more functionality and flexibility in terms of scheduling of resources for the assigned user equipment 10.
  • the base station 4 supplies in a geographical area of cell 5 connectivity for user equipments situated in this geographical area. This allows for a user equipment 10 located in the cell are 5 to associate with base station 4, in particular to camp on the base station 4.
  • the user equipment 10 comprises an antenna 11 as connection point to the air interface 2. It further comprises an identification module 3, in particular a SIM card, an UICC, or a soldered identification module, or a piece of software contained in one of the other components in a secure manner, which holds the authentication credentials with which the user equipment 10 registers at the cellular network 1, in particular the base station 4.
  • This identification modules resp. its stored data allows the cellular network 1 to figure out if the user equipment 10 is entitled to be served within the cellular network 1, and in particular if it is prepaid or a contract subscription with proven credibility.
  • the user equipment 10 comprises receiving and transmitting circuitry, processing circuitry and volatile and/or permanent memory (all not shown).
  • FIG. 2a shows schematically the situation, how a user equipment 10, which is configured to transmit data in a periodicity related transmission mode, and the base station 4 it is camping on, are exchanging data in order to fulfil a regular sending task.
  • FIG. 2a are visible time bars for the user equipment 10 and the base station 4. Arrows indicate a data transmission from one party to the other.
  • the user equipment 10 is typically equipped with a clock resp. a timer which figures out, when a data transmission is due.
  • the user equipment 10 received information about the schedule from a remote server (not shown).
  • the remote server thus tries to avoid peaks where all supported user equipments, even in different cells, are providing their data.
  • the user equipment sends a request to the base station to set up a dedicated prescheduled uplink transmission schedule. This request comprises at least an indication relating to the preferred periodicity and the amount of data to be transmitted per uplink occasion.
  • the base station 4 evaluates the request and in case of sufficient resources for fulfilling the request confirms setting up a dedicated prescheduled uplink transmission schedule, by means of sending response message 21, which includes the details of periodicity and allocated resources for data transmission at the respective uplink occasion 26.
  • both the user equipment 10 and the base station activate the dedicated prescheduled uplink transmission schedule instead of normal scheduled communication.
  • the user equipment conducts further steps, in particular switch off mobility related measures. That means it assumes due to the fact that it is a stationary user equipment and it successfully camped on a base station 4, no cell-reselection is necessary for the time being.
  • the user equipment 10 and the base station 4 each set a timer according to the periodicity, in particular an offset in seconds or frames to the last communication.
  • the base station 4 allocates the respective resources for receiving the data transmission expected from the user equipment. This means now the data transmission window of the user equipment is open, which is here called uplink occasion 26.
  • user equipment 10 With the data transmissions 23 user equipment 10 now submits without further signalling exchange in advance between the user equipment and the base station the data which are preferably dedicated for a remote server, e.g. the metering collection server, in the amount as allowed with the response message 21.
  • a remote server e.g. the metering collection server
  • the base station 4 acknowledges with acknowledge message 24 safe receipt of the transmitted data from the user equipment 10.
  • this is displayed with one message 24 after the complete data transmissions 23, but an acknowledgement message per data transmission message 23 is as alternative solution also part of this embodiment.
  • next data transmission comprises the same message flow as the previously described. It is a matter of agreement between the user equipment and the base station, if the next timer is started at the end of the transmission, that is with message 24, or directly after expiry of the previous timer, that is at system frame number 22.
  • Fig. 2b the dedicated prescheduled uplink transmission schedule started in Fig. 2a is continued with another uplink occasion 26, where at time frame 22 further data transmissions 23 are carried out.
  • the user equipment After a couple of such transmissions (indicated by blanked part 25) the user equipment is occupied with a data transmission 27 session unrelated to the dedicated prescheduled uplink transmission schedule. Instead in this example a larger download of data is carried out. This might be a software download or the like.
  • low-capability devices e.g. operating in low categories of the technology standard, like NB-IoT, Cat-M, Cat-1, and/or in a mode like enhanced coverage such data transmission may take a while.
  • the data transmission session overlaps with the uplink occasion window 26. Consequently the user equipment 10, in particular when not capable of carrying out additional data transmission sessions in parallel to a download, would miss the upload occasion 26, which means no data transmission 23 as agreed in the dedicated prescheduled uplink transmission schedule is carried out.
  • the data transmission 27 is known to the base station 4. Hence the data transmissions 27 can be considered as reason for missing the uplink occasion 26. Consequently the base station does not cancel the dedicated prescheduled uplink transmission schedule, instead allocates for the next uplink occasion at next frame 22 the respective resources for receiving data transmissions 23 again.
  • the user equipment At the next uplink occasion 26 the user equipment is not occupied anymore with a data transmission session and consequently makes its data transmissions 23 again.
  • the dedicated prescheduled uplink transmission schedule is therefore supposed to continue.
  • FIG. 3 the flow chart shows the procedure according to an exemplifying embodiment of the invention from the perspective of the base station according to the first aspect of the invention.
  • step S1 user equipment 10 and base station 4 agree on a dedicated prescheduled uplink transmission schedule, in this case the implementation known as D-PUR.
  • a dedicated prescheduled uplink transmission schedule in this case the implementation known as D-PUR.
  • Such agreement typically requires a request from the user equipment, indicating at least envisaged periodicity and the amount of data.
  • the base station responds and provides data indicating which periodicity and allocated data per uplink occasion would be possible.
  • the user equipment accepts this response or cancels the dedicated prescheduled uplink transmission schedule, when not sufficient.
  • the base station sets an internal timer. At expiry of the timer at step S2 the base station expects an uplink transmission at the uplink occasion according to the dedicated prescheduled uplink transmission schedule.
  • step S3 It is then checked in decision step S3 if the base station received a data transmission according to the dedicated prescheduled uplink transmission schedule. If this is the case the flow branches again to step S2, where in the same periodicity the next uplink transmission is expected. As the periodicity might be in the range of hours or days, this might take some time, and is therefore preferably exception resp. interrupt triggered, instead of implementing a waiting loop.
  • step S4 the flow branches to step S4, where another check is carried out.
  • the base station considers the user equipment as unavailable, that means as occupied at the uplink occasion. That means, it is checked if the base station is aware of any reasons why the user equipment might not be able to make a data transmission. As shown in the example before, this might be due to unplanned massive data transmissions session. This might further be due to a blocked transmission from a radio policy instruction by the base station itself.
  • step S2 There at the next uplink occasion a normal data transmission according to the dedicated prescheduled uplink transmission schedule might happen.
  • step S5 the base station decides to cancel the dedicated prescheduled uplink transmission schedule resp. D-PUR agreement. This might in another embodiment be the case not before a predetermined number of - in particular successive - missed uplink occasions, where no unavailability of the user equipment is known to the base station, has occurred.
  • step S2 refrain from allocating resources for the next uplink occasion, instead such resources could be assigned to another user equipment, should it request resources at that time.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
EP19165108.2A 2019-03-26 2019-03-26 Konfiguration eines dedizierten uplink-ressourcenübertragungsplans Withdrawn EP3716711A1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP19165108.2A EP3716711A1 (de) 2019-03-26 2019-03-26 Konfiguration eines dedizierten uplink-ressourcenübertragungsplans
US17/441,739 US11770824B2 (en) 2019-03-26 2020-03-24 Configuration of dedicated uplink resource transmission schedule
JP2021548631A JP7196328B2 (ja) 2019-03-26 2020-03-24 専用アップリンクリソース送信スケジュールの設定
CN202080023965.6A CN113892294A (zh) 2019-03-26 2020-03-24 专用上行链路资源传输调度的配置
KR1020217030672A KR20210127998A (ko) 2019-03-26 2020-03-24 전용 업링크 자원 송신 스케줄의 구성
PCT/EP2020/058178 WO2020193557A1 (en) 2019-03-26 2020-03-24 Configuration of dedicated uplink resource transmission schedule
EP20712585.7A EP3949593B1 (de) 2019-03-26 2020-03-24 Konfiguration eines dedizierten uplink-ressourcenübertragungsplans

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EP3949593B1 (de) 2024-04-24
JP7196328B2 (ja) 2022-12-26
US20220191901A1 (en) 2022-06-16
CN113892294A (zh) 2022-01-04
EP3949593A1 (de) 2022-02-09
US11770824B2 (en) 2023-09-26
JP2022521396A (ja) 2022-04-07
WO2020193557A1 (en) 2020-10-01
EP3949593C0 (de) 2024-04-24
KR20210127998A (ko) 2021-10-25

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